Numerical Simulation Model of Underground Cavity Generalized Analysis Based on Geological and Monitoring Data
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Abstract
With the large-scale surge tank engineering of a certain hydropower station as the research background, generalized analysis of the media type, the initial stress field, the main structure surface and groundwater was carried out; three dimensional numerical calculation model was established to simulate cavern construction; the stress and displacement change distribution of surrounding rock in the construction process were analyzed; some significant conclusions obtained by comparison the calculating displacement with the measured displacement. Studies show that, the calculation constitutive model and the initial stress field can produce certain effect to surrounding rock stability; surrounding rock is relatively stable in the construction process; for the large-scale surge tank engineering of such hydropower station, it is closer to real characteristics of surrounding rock that both the elastic-plastic constitutive model and tectonic stress field are chosen to participate in numerical simulation in the construction process, which has important guiding significance for the numerical calculation of other related engineering problems.
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